Spacelike and Time Dependent Branes from DBI

Wang, John E.

doi:10.1088/1126-6708/2002/10/037

Cited by 27 publications

(25 citation statements)

References 33 publications

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“…Other aspects of closed string field produced by unstable D-branes and other time dependent configurations have been discussed in [69,85,315,285,450,406,534,84,75,407,329,76,119,405,501,452,271,393,267,344,516,32,218,345,305].…”

Section: Closed String Fields Produced By |Bmentioning

confidence: 99%

Tachyon Dynamics in Open String Theory

SEN¹

2005

Progress in String Theory

103

193

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In this review we describe our current understanding of the properties of open string tachyons on an unstable D-brane or brane-antibrane system in string theory. The various string theoretic methods used for this study include techniques of two dimensional conformal field theory, open string field theory, boundary string field theory, non-commutative solitons etc. We also describe various attempts to understand these results using field theoretic methods. These field theory models include toy models like singular potential models and p-adic string theory, as well as more realistic version of the tachyon effective action based on Dirac-Born-Infeld type action. Finally we study closed string background produced by the 'decaying' unstable D-branes, both in the critical string theory and in the two dimensional string theory, and describe the open string completeness conjecture that emerges out of this study. According to this conjecture the quantum dynamics of an unstable D-brane system is described by an internally consistent quantum open string field theory without any need to couple the system to closed strings. Each such system can be regarded as a part of the 'hologram' describing the full string theory.

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Section: Closed String Fields Produced By |Bmentioning

confidence: 99%

Tachyon Dynamics in Open String Theory

SEN¹

2005

Progress in String Theory

103

193

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“…[5]. In Section 6 the creation of codimension one D-branes was qualitatively discussed from the viewpoint of charge conservation.…”

Section: Conclusion and Discussionmentioning

confidence: 99%

“…Let us consider the following fluctuation 5) where µ = 0, 1, · · · , 9. Substituting this into the action and collecting terms quadratic in the fluctuation fields, we obtain the fluctuation action To see the physical meaning of these fluctuations, we redefine the fields ast 1,2 = e −(ax 0 ) 2 /2 t 1,2 so the newly defined fieldst 1,2 have canonical kinetic terms.…”

Section: Fluctuation Spectrummentioning

confidence: 99%

Time evolution viaS-branes

Hashimoto

Nagaoka

et al. 2003

Phys. Rev. D

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Using S(pacelike)-branes defined through rolling tachyon solutions, we show how the dynamical formation of D(irichlet)-branes and strings in tachyon condensation can be understood. Specifically we present solutions of S-brane actions illustrating the classical confinement of electric and magnetic flux into fundamental strings and D-branes. The role of S-branes in string theory is further clarified and their RR charges are discussed. In addition, by examining "boosted" S-branes, we find what appears to be a surprising dual S-brane description of strings and D-branes, which also indicates that the critical electric field can be considered as a self-dual point in string theory. We also introduce new tachyonic S-branes as Euclidean counterparts to non-BPS branes.

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“…], and let ρ and θ be local coordinates on IR 2 /∆ as in equation (8). Then [recalling that S 1 /Z Z 2 is the same as a closed line interval] we can define a metric on…”

Section: Two Ways Outmentioning

confidence: 99%

The strong energy condition and the S-brane singularity problem

McInnes

2003

J. High Energy Phys.

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Recently it has been argued that, because tachyonic matter satisfies the Strong Energy Condition [SEC], there is little hope of avoiding the singularities which plague S-Brane spacetimes. Meanwhile, however, Townsend and Wohlfarth have suggested an ingenious way of circumventing the SEC in such situations, and other suggestions for actually violating it in the S-Brane context have recently been proposed. Of course, the natural context for discussions of [effective or actual] violations of the SEC is the theory of asymptotically deSitter spacetimes, which tend to be less singular than ordinary FRW spacetimes. However, while violating or circumventing the SEC is necessary if singularities are to be avoided, it is not at all clear that it is sufficient. That is, we can ask: would an asymptotically deSitter S-brane spacetime be non-singular? We show that this is difficult to achieve; this result is in the spirit of the recently proved "S-brane singularity theorem". Essentially our results suggest that circumventing or violating the SEC may not suffice to solve the S-Brane singularity problem, though we do propose two ways of avoiding this conclusion.

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Spacelike and Time Dependent Branes from DBI

Cited by 27 publications

References 33 publications

Tachyon Dynamics in Open String Theory

Tachyon Dynamics in Open String Theory

Time evolution viaS-branes

The strong energy condition and the S-brane singularity problem

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